A hard-disk term that describes a method of arranging disk sectors to compensate for relatively slow computers. Spreads sectors apart instead of arranging them consecutively. For example, 3:1 interleaving means your system reads one out of every three tracks on one rotation. The time required for the extra spin lets the read/write head catch up with the disk drive, which might otherwise outrun the head's ability to read the data. Thanks to track buffering and the speed of today's PCs, interleaving is obsolete. Look for a "1:1 interleaving," which indicates a noninterleaved drive.
The alternate placement of audio and video data with computer data to permit faster access and closer synchronization of sound to onscreen displays. Interleaving is defined under Green Book.
Distributing access order in other fashion than a straight access. Electronics of the older drives was not fast enough to read sectors one after another. Therefore, sector renumbering was introduced creating artificial delays in the stream of incoming data. Interleaving factor 3:1 meant that two sectors will be skipped before reading of the next one. Modern drives have electronics capable of handling the data generated by the drive data stream, making interleaving obsolete.